<template>
 <div>
   <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色区域 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

      <!-- 角色列表区域 -->
      <el-table :data="rolelist"
      border
      stripe>
      <!-- 展开列 -->
      <el-table-column type="expand">
          <template v-slot="scope">
            <el-row :class="['bdbottom',i1 ===0? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="i1">
              <!-- 渲染一级权限 -->
              <el-col :span="5" >
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二三级权限 -->
              <el-col :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2 ===0? '':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="i2"  >
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="(item3,i3) in item2.children" :key="i3" type="warning" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
      </el-table-column>

      <!-- 索隐列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template v-slot="scope">
           <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
           <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close = " setRightDialogClose"
     >
     <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" 
      show-checkbox
      node-key="id"
      default-expand-all
      :default-checked-keys="defKeys"
      ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
 </div>
</template>
 
<script>
export default {

 data () {
  return {
    //所有角色列表数据
    rolelist:[],
    //控制分配权限对话框的显示和隐藏
    setRightDialogVisible:false,
    // 所有权限的数据
    rightslist:[],
    treeProps:{
      label:'authName',
      children:'children'
    },
    //默认选中的id值节点
    defKeys:[],
    //即将分配角色的id
    roleId:'',
  }
 },
  created(){
    this.getRolesList()
  },
  methods:{
    async getRolesList(){
      const {data:res} = await this.$http.get('roles')
      if(res.meta.status != 200){
        return this.$message.error('获取角色列表失败')
      }
      this.rolelist = res.data
      console.log(this.rolelist)
    },
    //根据id删除对应的权限
    async removeRightById(role,rightId){
      //弹框提示 是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
      }).catch(err=>err)
      if(confirmResult != 'confirm'){
        return this.$message.info('已取消删除')
      }
      const {data:res} = await  this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if(res.meta.status !=200){
        return this.$message.error('删除权限失败')
      }
      this.$message.success('删除权限成功')
      role.children = res.data
    },
    //展示分配权限的对话框
    async showSetRightDialog(role){
      this.roleId = role.id
      //获取所有权限数据
      const {data:res} = await this.$http.get('rights/tree')
      if(res.meta.status != 200){
        return this.$message.error('获取权限失败')
      }
      this.rightslist = res.data  
      console.log(this.rightslist)
      this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible=true
    },
    //通过递归获取角色下所有三级权限id
    getLeafKeys(node,arr){
      if(!node.children){
        return arr.push(node.id)
      }
      node.children.forEach(item  => 
        this.getLeafKeys(item,arr)
      );
    },
    //监听分配权限对话框关闭事件
    setRightDialogClose(){
      this.defKeys =[]
    },
    //点击为角色分配权限
    async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const {data:res} = await this.$http.post(`roles/ ${this.roleId} /rights`,{rids:idStr})

      if(res.meta.status != 200){
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配角色权限成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  } 
}

</script>
 
<style scoped lang = "less">
.el-tag{
  margin: 7px;
}
.bdtop{
  border-top: 1px solid #eee;
}
.bdbottom{
  border-top: 1px solid #eee;
}
.vcenter{
  display: flex;
  align-items: center;
}

</style>